Domestic And Foreign Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Domestic And Foreign Income Taxes [Abstract]
Net operating loss carry forwards and credits	$ 9,415	$ 6,048
Inventory	678	558
Compensation accruals	1,046	1,083
Accruals and reserves	206	108
Credits	382	387
Other	372	757
Total Deferred tax assets	12,099	8,941
Less: valuation allowance	(10,791)	(7,407)
Deferred tax assets net of valuation allowance	1,308	1,534
Deferred tax liabilities depreciation and amortization	(1,068)	(1,117)
Total deferred tax liabilities	(1,068)	(1,117)
Net deferred tax	$ 240	$ 417